U.S. ROBOTICS, INC.
SPORTSTER 1200| 
 Modem Type  | 
 Data (synchronous/asynchronous)  | 
| 
 Maximum Data Rate  | 
 1200bps  | 
| 
 Data Bus  | 
 External  | 
| 
 Data Modulation Protocol  | 
 Bell 103A/212A  | 

| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Line out  | 
 CN1  | 
 Power  | 
 CN4  | 
| 
 Line in  | 
 CN2  | 
 Volume  | 
 SW3  | 
| 
 RS-232/422  | 
 CN3  | 
 Power  | 
 SW2  | 
| 
 DIAGNOSTIC LED(S)  | |||
| 
 LED  | 
 Color  | 
 Status  | 
 Condition  | 
| 
 LED1  | 
 Red  | 
 On  | 
 Analog loopback self test mode  | 
| 
 LED1  | 
 Green  | 
 On  | 
 Data mode  | 
| 
 LED2  | 
 Red  | 
 Blinking  | 
 Modem is transmitting/receiving data  | 
| 
 LED2  | 
 Green  | 
 On  | 
 Carrier signal detected  | 
| 
 DTR SIGNAL  | |
| Setting | 
 SW1/1  | 
| » On | 
 DTR forced high  | 
| Off | 
 DTR normal  | 
| 
 RESULT CODES  | |
| Setting | 
 SW1/2  | 
| » Verbose result codes enabled | 
 On  | 
| Numeric result codes enabled | 
 Off  | 
| 
 RESULT CODES DISPLAY  | |
| Setting | 
 SW1/3  | 
| » Display enabled | 
 On  | 
| Display disabled | 
 Off  | 
| 
 ECHO COMMANDS DISPLAY  | |
| Setting | 
 SW1/4  | 
| » Local echo enabled | 
 Off  | 
| Local echo disabled | 
 On  | 
| 
 AUTO ANSWER  | |
| Setting | 
 SW1/5  | 
| » Modem doe not answer on first ring | 
 On  | 
| Modem answers on first ring | 
 Off  | 
| 
 CARRIER DETECT  | |
| Setting | 
 SW1/6  | 
| » CD normal | 
 Off  | 
| CD forced high | 
 On  | 
| 
 MULT-LINE INSTALLATION  | |
| Setting | 
 SW1/7  | 
| » Single phone connected | 
 Off  | 
| Multiple phones connected | 
 On  | 
| 
 AT COMMAND SET  | |
| Setting | 
 SW1/8  | 
| » AT command set recognized | 
 On  | 
| AT command set disabled | 
 Off  | 
Proprietary AT Command Set
| 
 ANALOG LOOPBACK SELF TEST  | |
| 
 Type:  | 
 Register  | 
| 
 Format:  | 
 AT [cmds] S16=n [cmds]  | 
| 
 Example:  | 
 ATS16=139 <CR> | 
| 
 Description:  | 
 Selects the tone dialing test  | 
| Command | 
 Function  | 
| 
 0  | 
 Data mode.  | 
| 
 1  | 
 Analog loopback.  |